According to the mountain environment and topography, this paper describes the main problems of engineering characteristics and environmental influences of freeways in mountain areas, analyzes the environmental influence factors in construction and operation periods, and presents the environmental protection measures and management measures.
On the one hand, the test of basic behaviors, modulus of resilience under repeated loading, dynamic strength and dynamic deformation are studied in laboratory. The effect of mica content on the engineering characteristics of granite subgrade soil is studied, by separating mica from granite residual soil and forming the specimen according to different mica content, and conducting CBR test and resilience modulus test.
Based on experimental investigation,the main engineering characteristics of drift sand in desert zone have been revealed in this paper. The grain diameter is 0.25～0.1 mm,the uniformity coefficient 1.2～2.0,the curvature coefficient 0.9～1.3,which is poorly graded sand. The mineral particle is mainly arkose's pyramid,the natural dry density is 1.48～1.68 g/cm~(3).
Based on the arrangement and analysis of test datum, the engineering characteristics of the fill are studied, such as shear strength, compressibility, permeability, mechanical analysis, capillary height etc.
Research methods:Based on the economic and natural conditions and engineering characteristics along planned Changshou-Dianjiang-Liangping Railway Line,the track scheme is optimized through making analysis of the design scheme of the run of railway line,design grade and track joining in order to save investment and coordinate the railway with other infrastructures.
A translog cost function is specified and estimated with controls for system (engineering) characteristics and environmental variables, and it is found that the reforms had substantial cost-reducing effects.
Descriptions are given of block diagrams, working principles, and engineering characteristics of promising standards for the units of laser energy and meanpower.
Calculation and prediction of reductions in the illumination-engineering characteristics of transparent shields
The engineering characteristics of designs with magnets that use copper or beryllium copper alloys are presented.
Engineering characteristics, diagrams, and results of the introduction are presented.